/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dolphinscheduler.plugin.datasource.hive.param;

import org.apache.dolphinscheduler.common.constants.Constants;
import org.apache.dolphinscheduler.common.constants.DataSourceConstants;
import org.apache.dolphinscheduler.common.utils.JSONUtils;
import org.apache.dolphinscheduler.plugin.datasource.api.datasource.AbstractDataSourceProcessor;
import org.apache.dolphinscheduler.plugin.datasource.api.datasource.BaseDataSourceParamDTO;
import org.apache.dolphinscheduler.plugin.datasource.api.datasource.DataSourceProcessor;
import org.apache.dolphinscheduler.plugin.datasource.api.utils.CommonUtils;
import org.apache.dolphinscheduler.plugin.datasource.api.utils.PasswordUtils;
import org.apache.dolphinscheduler.spi.datasource.BaseConnectionParam;
import org.apache.dolphinscheduler.spi.datasource.ConnectionParam;
import org.apache.dolphinscheduler.spi.enums.DbType;

import org.apache.commons.collections4.MapUtils;
import org.apache.commons.lang3.StringUtils;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.LinkedHashMap;
import java.util.Map;

import com.google.auto.service.AutoService;

@AutoService(DataSourceProcessor.class)
public class HiveDataSourceProcessor extends AbstractDataSourceProcessor {

  @Override
  public BaseDataSourceParamDTO castDatasourceParamDTO(String paramJson) {
    return JSONUtils.parseObject(paramJson, HiveDataSourceParamDTO.class);
  }

  @Override
  public BaseDataSourceParamDTO createDatasourceParamDTO(String connectionJson) {
    HiveDataSourceParamDTO
        hiveDataSourceParamDTO = new HiveDataSourceParamDTO();
    HiveConnectionParam hiveConnectionParam = (HiveConnectionParam) createConnectionParams(connectionJson);

    hiveDataSourceParamDTO.setDatabase(hiveConnectionParam.getDatabase());
    hiveDataSourceParamDTO.setUserName(hiveConnectionParam.getUser());
    hiveDataSourceParamDTO.setOther(parseOther(hiveConnectionParam.getOther()));
    hiveDataSourceParamDTO.setLoginUserKeytabUsername(hiveConnectionParam.getLoginUserKeytabUsername());
    hiveDataSourceParamDTO.setLoginUserKeytabPath(hiveConnectionParam.getLoginUserKeytabPath());
    hiveDataSourceParamDTO.setJavaSecurityKrb5Conf(hiveConnectionParam.getJavaSecurityKrb5Conf());

    String[] tmpArray = hiveConnectionParam.getAddress().split(Constants.DOUBLE_SLASH);
    StringBuilder hosts = new StringBuilder();
    String[] hostPortArray = tmpArray[tmpArray.length - 1].split(Constants.COMMA);
    for (String hostPort : hostPortArray) {
      hosts.append(hostPort.split(Constants.COLON)[0]).append(Constants.COMMA);
    }
    hosts.deleteCharAt(hosts.length() - 1);
    hiveDataSourceParamDTO.setHost(hosts.toString());
    hiveDataSourceParamDTO.setPort(Integer.parseInt(hostPortArray[0].split(Constants.COLON)[1]));

    return hiveDataSourceParamDTO;
  }

  @Override
  public BaseConnectionParam createConnectionParams(BaseDataSourceParamDTO datasourceParam) {
    HiveDataSourceParamDTO hiveParam = (HiveDataSourceParamDTO) datasourceParam;
    StringBuilder address = new StringBuilder();
    address.append(DataSourceConstants.JDBC_HIVE_2);
    for (String zkHost : hiveParam.getHost().split(",")) {
      address.append(String.format("%s:%s,", zkHost, hiveParam.getPort()));
    }
    address.deleteCharAt(address.length() - 1);
    String jdbcUrl = address.toString() + "/" + hiveParam.getDatabase();

    HiveConnectionParam hiveConnectionParam = new HiveConnectionParam();
    hiveConnectionParam.setDatabase(hiveParam.getDatabase());
    hiveConnectionParam.setAddress(address.toString());
    hiveConnectionParam.setJdbcUrl(jdbcUrl);
    hiveConnectionParam.setUser(hiveParam.getUserName());
    hiveConnectionParam.setPassword(PasswordUtils.encodePassword(hiveParam.getPassword()));
    hiveConnectionParam.setDriverClassName(getDatasourceDriver());
    hiveConnectionParam.setValidationQuery(getValidationQuery());

    if (CommonUtils.getKerberosStartupState()) {
      hiveConnectionParam.setPrincipal(hiveParam.getPrincipal());
      hiveConnectionParam.setJavaSecurityKrb5Conf(hiveParam.getJavaSecurityKrb5Conf());
      hiveConnectionParam.setLoginUserKeytabPath(hiveParam.getLoginUserKeytabPath());
      hiveConnectionParam.setLoginUserKeytabUsername(hiveParam.getLoginUserKeytabUsername());
    }
    hiveConnectionParam.setOther(transformOther(hiveParam.getOther()));
    hiveConnectionParam.setProps(hiveParam.getOther());
    return hiveConnectionParam;
  }

  @Override
  public ConnectionParam createConnectionParams(String connectionJson) {
    return JSONUtils.parseObject(connectionJson, HiveConnectionParam.class);
  }

  @Override
  public String getDatasourceDriver() {
    return DataSourceConstants.ORG_APACHE_HIVE_JDBC_HIVE_DRIVER;
  }

  @Override
  public String getValidationQuery() {
    return DataSourceConstants.HIVE_VALIDATION_QUERY;
  }

  @Override
  public String getJdbcUrl(ConnectionParam connectionParam) {
    HiveConnectionParam hiveConnectionParam = (HiveConnectionParam) connectionParam;
    String jdbcUrl = hiveConnectionParam.getJdbcUrl();
    String otherParams = filterOther(hiveConnectionParam.getOther());
    if (StringUtils.isNotEmpty(otherParams) && !"?".equals(otherParams.substring(0, 1))) {
      jdbcUrl += ";";
    }
    return jdbcUrl + otherParams;
  }

  @Override
  public Connection getConnection(ConnectionParam connectionParam) throws IOException, ClassNotFoundException, SQLException {
    HiveConnectionParam hiveConnectionParam = (HiveConnectionParam) connectionParam;
    CommonUtils.loadKerberosConf(hiveConnectionParam.getJavaSecurityKrb5Conf(),
        hiveConnectionParam.getLoginUserKeytabUsername(), hiveConnectionParam.getLoginUserKeytabPath());
    Class.forName(getDatasourceDriver());
    return DriverManager.getConnection(getJdbcUrl(connectionParam),
        hiveConnectionParam.getUser(), PasswordUtils.decodePassword(hiveConnectionParam.getPassword()));
  }

  @Override
  public DbType getDbType() {
    return DbType.HIVE;
  }

  @Override
  public DataSourceProcessor create() {
    return new HiveDataSourceProcessor();
  }

  private String transformOther(Map<String, String> otherMap) {
    if (MapUtils.isEmpty(otherMap)) {
      return null;
    }
    StringBuilder stringBuilder = new StringBuilder();
    otherMap.forEach((key, value) -> stringBuilder.append(String.format("%s=%s;", key, value)));
    return stringBuilder.toString();
  }

  private String filterOther(String otherParams) {
    if (StringUtils.isBlank(otherParams)) {
      return "";
    }

    StringBuilder hiveConfListSb = new StringBuilder();
    hiveConfListSb.append("?");
    StringBuilder sessionVarListSb = new StringBuilder();

    String[] otherArray = otherParams.split(";", -1);

    for (String conf : otherArray) {
      sessionVarListSb.append(conf).append(";");
    }

    // remove the last ";"
    if (sessionVarListSb.length() > 0) {
      sessionVarListSb.deleteCharAt(sessionVarListSb.length() - 1);
    }

    if (hiveConfListSb.length() > 0) {
      hiveConfListSb.deleteCharAt(hiveConfListSb.length() - 1);
    }

    return sessionVarListSb.toString() + hiveConfListSb.toString();
  }

  private Map<String, String> parseOther(String other) {
    if (other == null) {
      return null;
    }
    Map<String, String> otherMap = new LinkedHashMap<>();
    String[] configs = other.split(";");
    for (String config : configs) {
      otherMap.put(config.split("=")[0], config.split("=")[1]);
    }
    return otherMap;
  }
}
